QID 198293

USN-4754-1 fixed vulnerabilities in Python. This update provides the corresponding updates for Ubuntu 18.04 and Ubuntu 20.04.

It was discovered that Python allowed remote attackers to cause a denial of service (resource consumption) via a ZIP bomb.

It was discovered that Python had potentially misleading information about whether sorting occurs.

It was discovered that Python incorrectly handled certain TAR archives.

It was discovered that Python allowed an HTTP server to conduct Regular Expression Denial of Service (ReDoS) attacks against a client because of urllib.

It was discovered that Python allowed CRLF injection if the attacker controls the HTTP request method, as demonstrated by inserting CR and LF control characters in the first argument of HTTPConnection.

Original advisory details:

It was discovered that Python incorrectly handled certain inputs.

It was discovered that Python allowed remote attackers to cause a denial of service (resource consumption) via a ZIP bomb. (CVE-2019-9674).

It was discovered that Python had potentially misleading information about whether sorting occurs. (CVE-2019-17514)

An attacker could possibly use this issue to cause a denial of service. (CVE-2019-20907)

(CVE-2020-8492)

(CVE-2020-26116)

An attacker could possibly use this issue to execute arbitrary code or cause a denial of service. (CVE-2020-27619, CVE-2021-3177)